The Actual Definition of Muscle Tone. Muscle tone, also known as muscle tonus or residual muscle tension, is an unconscious low level contraction of your muscles while they are at rest. Essentially, muscle tone is what makes your muscles still feel somewhat firm while you are resting and not intentionally tensing them.
Everyone experiences abdominal pain from time to time. Other terms used to describe abdominal pain are stomachache, tummy ache, gut ache and bellyache. Abdominal pain can be mild or severe. It may be continuous or come and go. Abdominal pain can be short-lived (acute) or occur over weeks and months (chronic).
Other ways to describe pain in your abdomen include: 1  Generalized pain: This means that you feel it in more than half of your belly. 2  Localized pain: This is pain found in only one area of your belly. 3  Cramp-like pain: This type of pain is not serious most of the time. 4  Colicky pain: This type of pain comes in waves.